3 Answers
3

It's just the child meta doing what it should be doing by acting as if it's as old as the parent site, thus badge awarding gets a little noisy initially. You'll get one yearling for each year of active participation on the main site (or the same number you have there).

Some will see an additional flurry of them when I start migrating some of the more recent and still relevant SO specific questions on MSE back here later today, when I get confirmation that I'm clear to use the SuperMultiCollidingRainbowBulkQuestionChucker tool.

These were because of Operation Split, All The Metas!, just a task like a system maintenance happened so some random things happened during the task being completed. I saw it as well, several times, maybe twice.